Keyboard



FIG. 1 is a top front left side perspective view of the keyboard showingour new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof.

The ornamental design for a keyboard, as shown and described.